diff --git a/drivers/misc/kgdbts.c b/drivers/misc/kgdbts.c
index 59c118c..27dc463 100644
--- a/drivers/misc/kgdbts.c
+++ b/drivers/misc/kgdbts.c
@@ -988,7 +988,7 @@
 
 static int kgdbts_option_setup(char *opt)
 {
-	if (strlen(opt) > MAX_CONFIG_LEN) {
+	if (strlen(opt) >= MAX_CONFIG_LEN) {
 		printk(KERN_ERR "kgdbts: config string too long\n");
 		return -ENOSPC;
 	}